Valve for a non-refillable pressurized container

Details Valve for a non-refillable pressurized container Valve for a non-refillable pressurized container

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 1/30 (2006.01) F16K 31/44 (2006.01) F17C 13/04 (2006.01)

Patent

CA 2489274

A valve for a pressurized container includes a valve housing having a central bore and a port in the for connection of a nozzle. Preferably, the valve has a unidirectional stepped valve housing. In the housing is a central bore that includes an upper portion, lower portion and a middle portion. The lower portion is narrower than the middle portion which in turn is narrower than the upper portion. The port is provided in the middle portion of said housing to facilitate connection of a nozzle to the valve. The valve has a t-stem with a lower end having a key-way and a cavity for receiving the upper portion of the valve seat. The valve seat provides the primary valve seal when the valve is closed. It has a lower portion that is shaped to provide the primary valve seal in cooperation with the valve housing. The upper portion of the valve seat has a geometry for engaging the t-stem to provide a locked assembly. The t-stem and valve seat assembly are located in the central bore and cooperate to position the valve seat for the primary valve seal. Preferably, a blocking element is provided in the lower portion of the central bore to prevent refilling of the container. An o-ring also preferably is provided to form a seal between the valve seat and the valve housing when the valve is in an open position.

L'invention concerne un clapet pour un contenant sous pression, lequel comprend une enveloppe de clapet poss~dant un al~sage central et un port pour la connexion d'une buse. De pr~f~rence, ce clapet poss­de une enveloppe ~ gradins unidirectionnelle. Dans l'enveloppe se situe un al~sage central qui comprend une partie sup~rieure, une partie inf~rieure et une partie m~diane. La partie inf~rieure est plus ~troite que la partie m~diane qui est ~ son tour plus ~troite que la partie sup~rieure. Le port est situ~ dans la partie m~diane de cette enveloppe pour faciliter la connexion d'une buse avec le clapet. Ce clapet poss­de une tige en t avec une extr~mit~ inf~rieure poss~dant une rainure de clavette et une cavit~ pour loger la partie sup~rieure du si­ge de clapet. Le si­ge de clapet constitue le joint primaire du clapet lorsque ce dernier est ferm~. Il poss­de une partie inf~rieure calibr~e pour former le joint de clapet primaire en coop~ration avec l'enveloppe de clapet. La partie sup~rieure du si­ge de clapet a une forme lui permettant de se mettre en prise avec la tige en t afin de former un ensemble de verrouillage. L'ensemble tige en t et si­ge de clapet est situ~ dans l'al~sage central et les deux ~l~ments coop­rent pour positionner le si­ge de clapet pour le joint primaire de clapet. De pr~f~rence, un ~l~ment de blocage est situ~ dans la partie inf~rieure de l'al~sage central pour empÚcher la recharge du contenant. De pr~f~rence un joint torique permet ~galement de former un joint entre le si­ge de clapet et l'enveloppe de clapet lorsque ce clapet est dans une position ouverte.

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